#include <stdio.h>

int hour = 23; int time = 50;
int x =100;
void printf_time()
{
	 x = 10;
	printf("%d:%d\n",hour,time);
}	
int main(void)
{
        int hour = 0;
	int time = 30;
	printf("%d:%d\n",hour,time);
	printf_time();
	printf("%d:%d\n",hour,time);
	printf("x:%d\n",x);
	
	return 0;    
}	
